Re: Scsi card detection order in 2.2.x

Riley Williams (rhw@MemAlpha.CX)
Fri, 3 Sep 1999 12:17:19 +0100 (GMT)


Hi David.

On Thu, 2 Sep 1999, David Livingstone wrote:

>
> I have multiple scsi cards in the same machine(ie ICP/NCR) and I
> need the scsi disks detected in the same order every time. In
> 2.2.x is the only way to do this by my modifying the order in
> hosts.c ? I could use a combination of kernel/module loads but I
> would prefer to have both drivers in the kernel.

> The specific problem I'm running into is when a temporary
> external jaz is connected to the ncr scsi. Because the ncr is
> detected before the ICP the root disk now ends up as sdb instead
> of sda.

Isn't there something similar to the multi-ethernet thingie to deal
with this? I haven't used SCSI myself, but I have configured several
machines with multiple different ethernet cards (typically NE2k and
Tulip, but there have been other combinations) where I have needed to
guarantee the order they are detected.

The fix in that case was to use lilo's "append=" facility to specify
which driver should grab which card, and if it doesn't already exist,
a similar facility is probably a good idea for SCSI...

Best wishes from Riley.

+----------------------------------------------------------------------+
| There is something frustrating about the quality and speed of Linux |
| development, ie., the quality is too high and the speed is too high, |
| in other words, I can implement this XXXX feature, but I bet someone |
| else has already done so and is just about to release their patch. |
+----------------------------------------------------------------------+
* ftp://ftp.MemAlpha.cx/pub/rhw/Linux
* http://www.MemAlpha.cx/Linux/

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